weizhouapache commented on issue #9812:
URL: https://github.com/apache/cloudstack/issues/9812#issuecomment-2421584473

   > > > Thank you. Is there anything I need to notice before I create RBD on 
Ceph? Like "I need to create 2 pools one for primary storage the other one for 
secondary storage" or "I need to create multiple pools one for this service and 
one for the other service like Openstack"?
   > > 
   > > 
   > > It is totally up to you. You just need to create a pool for clodstack. 
For the rest space, you can do anything you want.
   > 
   > Thank you. Is secondary storage necessary? Is secondary storage just for a 
backup in Cloudstack?
   
   secondary storage is required. it stores templates and snapshots.
   However, you can not use ceph RBD pool as a secondary storage. 
   you can create cephfs , export it over NFS and add to cloudstack as a 
secondary storage.
   
   


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